But we did leave a stockpile of weapons and ammo. It's a minor inconvenience.
https://en.m.wikipedia.org/wiki/World_War_II_bomb_disposal_i...
https://en.m.wikipedia.org/wiki/World_War_II_bomb_disposal_i...
So let me reframe the question. Do you think it would be a good idea to store spent nuclear waste in present day Iraq or Syria?
The best way is to burn up these actinides in a suitable reactor.